Guides for accessing the internet securely and privately, including VPN reviews and setup tutorials.
VPN & Privacy What ChatGPT actually keeps after you delete a chat, how long OpenAI retains it, what the New York Times lawsuit changed, and the exact settings that limit training use.
VPN & Privacy Every major AI assistant's stated data retention, training defaults and opt-out limits, taken from the vendors' own policy pages and set side by side. Checked July 2026.
VPN & Privacy 哪些 AI 服务在国内打不开、为什么普通连接会失败、选服务商真正该看的三项指标，以及付款方式这一被忽略的门槛。
VPN & Privacy OpenAI 究竟保存什么、保留多长时间，删除后会发生什么，以及关闭「用于模型训练」的具体步骤。每个数字都附官方来源。
VPN & Privacy NordVPN, ExpressVPN, ZoogVPN, Surfshark, Proton VPN and Mullvad compared on what is verifiable: independent no-logs audits, jurisdiction, protocols and free-tier terms.
VPN & Privacy ChatGPT, Claude, Midjourney and most AI tools are blocked in China. This guide covers the best VPNs for AI access, how to set them up, and what actually works in 2026.
